NEWS AUTUMN 2018 PRODUCT NEWS AND INFORMATION DEAR CUSTOMER AND INTERESTED PARTIES, our main topic in this newsletter is our new develop- ment of the high current tester, which we have in the meantime further developed to the EOL End of Line Tester. This development concerns the hard- ware and the software. While we have intensively tested and improved the test unit, the pilot series has been prepared and will be put to the test at the beginning of 2019 to be tested under production conditions at one of our customers. You see dear reader, something is moving at CMWTEC and the team responsible for this is also introduced in this issue. However, a broad framework is dedicated to the review of the ELBC in Vienna. There our team presented our product portfolio, but above all our new development, to our customers and visitors. The pictures of a whole page show this. Stay interested, sincerely CREATIVE HEADS FOR INNOVATIVE DEVELOPMENTS Our strong design team is constantly working on new products and optimising our existing sys- tems. Highly motivated and with a large technical specialized knowledge it works on innovative and creative ideas around our customers a technical advantage to make possible. It is oriented to the requirements of the market and the input of our customers worldwide. Because only those who act and plan with foresight can achieve a lot and thus achieve the optimum result. Our customers have the highest priority and the productivity of the machines is therefore in the foreground for us. We work both in our engineering office and directly on site for our international customers. This flexible working enables us to optimally support our customers. From left to right: Daniel, Egzon, Giuliano, Demirel Ingrid Wipperfürth (Managing Director)
Transcript
NEWS AUTUMN 2018
PRODUCT NEWS AND INFORMATION
YOUR INDIVIDUAL SOLUTION
DEAR CUSTOMER ANDINTERESTED PARTIES,
our main topic in this newsletter is our new develop-
ment of the high current tester, which we have in
the meantime further developed to the EOL End of
Line Tester. This development concerns the hard-
ware and the software. While we have intensively
tested and improved the test unit, the pilot series
has been prepared and will be put to the test at the
beginning of 2019 to be tested under production
conditions at one of our customers.
You see dear reader, something is moving at
CMWTEC and the team responsible for this is also
introduced in this issue.
However, a broad framework is dedicated to the
review of the ELBC in Vienna. There our team
presented our product portfolio, but above all our
new development, to our customers and visitors.
The pictures of a whole page show this.
Stay interested, sincerely
CREATIVE HEADS FOR INNOVATIVE DEVELOPMENTSOur strong design team is constantly working on new products and optimising our existing sys- tems. Highly motivated and with a large technical specialized knowledge it works on innovative and creative ideas around our customers a technical advantage to make possible. It is oriented to the requirements of the market and the input of our customers worldwide. Because only those who act and plan with foresight can achieve a lot and thus achieve the optimum result. Our customers have the highest priority and the productivity of the machines is therefore in the foreground for us. We work both in our engineering office and directly on site for our international customers. This flexible working enables us to optimally support our customers. From left to right: Daniel, Egzon, Giuliano, DemirelIngrid Wipperfürth
(Managing Director)
NEW INNOVATIVE QUALITY INSPECTION PROCESSES IN FINISHING LINES
The reliability of automotive batteries is the most important feature, especially for the OEM market. To ensure
consistent reliability all automotive batteries are subjected to electrical quality tests prior to shipment. This 100%
quality check is performed in accordance with industry accepted standards.
The traditional test method today is that immediately after formation, and preferably, after post cleaning, the batte-
ries are discharged at high current for a few seconds. The open circuit voltage OCV before discharge and voltage un-
der load CCV at the end of discharge is determined and compared to nominal values resulting in a pass/fail decision.
To improve signifi cantly the reliability of test results the new CMWTEC End Of Line test machine now offers supple-
mental evaluation criteria. In doing so, we drew on the latest research results obtained using a variety of methods
for measuring internal resistance:
A working starter battery refl ects a single-digit mOhm value. Batteries developing high
resistance move into double-digit readings, and these can be caused by the following
conditions:
low electrolyte level
stratifi cation of electrolyte
sulfation of electrodes
bad weld connections
missing electrodes
wrong cell package assembly
broken collectors (COS)
With the new CMWTEC End Of Line test machine there are four test methods in addition to the
traditional methods which yields data referring to the internal resistance of the battery:
Sulphated electrode
Broken collector
CCVmin evaluation measures the voltage drop from OCV to CCVmin of the load jump, before the chemical reaction or „charge transfer“ takes place.
The two�tier DC load method is applying two sequential discharge loads of different currents and time durations and calculates the DC resistance DCR.
The AC impedance test is another common method. A 1kHz signal excites the battery and Ohm’s law calculates the AC impedance. The internal impedance of a cell determines its current carrying capability.
Delta_V measurement begins after passing the initial voltage drop when the voltage recovers and is in a relatively stable state. The acid is now diffusing into the pores of the active mass and there is a smooth electrochemical conversion of lead respective lead oxide. Delta_V measures the gradient of this process.
When removing the load after discharge, the voltage of a healthy battery gradually recovers and rises towards the nominal voltage. Differences in the affi nity of metals in the electrodes produce this voltage potential. A parasitic load or high self�discharge prevents voltage recovery. The second OCV (OCV2) cor-relates to irregularities affecting the recovery process.
By the optimisation of the process times and, in particular, by the reduction of the rest periods between the end of
formation and the fi nal quality test, the traditional method proves to be more and more ineffective.
The new CMWTEC 100% quality check machine allows to apply new test methods. In doing so, we drew on the
latest research results obtained using a variety of methods for measuring internal resistance.
REVIEW 16TH ELBC VIENNA 2018
PERFECT PRESENTATION OFKNOWLEDGE AND INFORMATION CMWTEC would like to thank all visitors who visited our booth at the 16th ELBC exhibition in Vienna. Your
positive feedback has encouraged us and we will continue to support you with research and development
results for this new inspection process and End Of Line Test Machine.
KNOWLEDGE AND INFORMATION would like to thank all visitors who visited our booth at the 16th ELBC exhibition in Vienna. Your
positive feedback has encouraged us and we will continue to support you with research and development positive feedback has encouraged us and we will continue to support you with research and development
results for this new inspection process and End Of Line Test Machine.
positive feedback has encouraged us and we will continue to support you with research and development
results for this new inspection process and End Of Line Test Machine.
would like to thank all visitors who visited our booth at the 16th ELBC exhibition in Vienna. Your
positive feedback has encouraged us and we will continue to support you with research and development
results for this new inspection process and End Of Line Test Machine.
positive feedback has encouraged us and we will continue to support you with research and development
results for this new inspection process and End Of Line Test Machine.
